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Commit 15cb981a by Richard Henderson Committed by Richard Henderson
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alpha.c (alpha_expand_prologue): Add a REF_CFA_REGISTER note when storing the… 

alpha.c (alpha_expand_prologue): Add a REF_CFA_REGISTER note when storing the frame pointer in a register.

        * alpha.c (alpha_expand_prologue): Add a REF_CFA_REGISTER
        note when storing the frame pointer in a register.
        (FRP): Don't redefine to nothing for epilogue.
        (alpha_expand_epilogue): Mark register and sp restores.
        (unicosmk_gen_dsib): Don't mark weird frame pointer adjust.

From-SVN: r148414
parent 7c1db202
Showing with 68 additions and 44 deletions
gcc/ChangeLog
2009-06-11 Richard Henderson <rth@redhat.com>
* alpha.c (alpha_expand_prologue): Add a REF_CFA_REGISTER
note when storing the frame pointer in a register.
(FRP): Don't redefine to nothing for epilogue.
(alpha_expand_epilogue): Mark register and sp restores.
(unicosmk_gen_dsib): Don't mark weird frame pointer adjust.
* config/alpha/alpha.c (alpha_emit_setcc): Fix test for
when gen_lowpart is needed.
......
gcc/config/alpha/alpha.c
......@@ -7727,11 +7727,14 @@ alpha_expand_prologue (void)
if (TARGET_ABI_OPEN_VMS)
{
/* Register frame procedures save the fp. */
if (alpha_procedure_type == PT_REGISTER)
/* Register frame procedures save the fp.
?? Ought to have a dwarf2 save for this. */
emit_move_insn (gen_rtx_REG (DImode, vms_save_fp_regno),
hard_frame_pointer_rtx);
{
rtx insn = emit_move_insn (gen_rtx_REG (DImode, vms_save_fp_regno),
hard_frame_pointer_rtx);
add_reg_note (insn, REG_CFA_REGISTER, NULL);
RTX_FRAME_RELATED_P (insn) = 1;
}
if (alpha_procedure_type != PT_NULL && vms_base_regno != REG_PV)
emit_insn (gen_force_movdi (gen_rtx_REG (DImode, vms_base_regno),
......@@ -8006,12 +8009,6 @@ alpha_output_function_end_prologue (FILE *file)
/* Write function epilogue. */
/* ??? At some point we will want to support full unwind, and so will
need to mark the epilogue as well. At the moment, we just confuse
dwarf2out. */
#undef FRP
#define FRP(exp) exp
void
alpha_expand_epilogue (void)
{
......@@ -8026,8 +8023,9 @@ alpha_expand_epilogue (void)
HOST_WIDE_INT reg_offset;
int fp_is_frame_pointer, fp_offset;
rtx sa_reg, sa_reg_exp = NULL;
rtx sp_adj1, sp_adj2, mem;
rtx sp_adj1, sp_adj2, mem, reg, insn;
rtx eh_ofs;
rtx cfa_restores = NULL_RTX;
int i;
sa_size = alpha_sa_size ();
......@@ -8078,7 +8076,7 @@ alpha_expand_epilogue (void)
if ((TARGET_ABI_OPEN_VMS
&& vms_unwind_regno == HARD_FRAME_POINTER_REGNUM)
|| (!TARGET_ABI_OPEN_VMS && frame_pointer_needed))
FRP (emit_move_insn (stack_pointer_rtx, hard_frame_pointer_rtx));
emit_move_insn (stack_pointer_rtx, hard_frame_pointer_rtx);
/* Cope with very large offsets to the register save area. */
if (reg_offset + sa_size > 0x8000)
......@@ -8094,7 +8092,7 @@ alpha_expand_epilogue (void)
sa_reg = gen_rtx_REG (DImode, 22);
sa_reg_exp = plus_constant (stack_pointer_rtx, bias);
FRP (emit_move_insn (sa_reg, sa_reg_exp));
emit_move_insn (sa_reg, sa_reg_exp);
}
/* Restore registers in order, excepting a true frame pointer. */
......@@ -8102,7 +8100,9 @@ alpha_expand_epilogue (void)
mem = gen_rtx_MEM (DImode, plus_constant (sa_reg, reg_offset));
if (! eh_ofs)
set_mem_alias_set (mem, alpha_sr_alias_set);
FRP (emit_move_insn (gen_rtx_REG (DImode, REG_RA), mem));
reg = gen_rtx_REG (DImode, REG_RA);
emit_move_insn (reg, mem);
cfa_restores = alloc_reg_note (REG_CFA_RESTORE, reg, cfa_restores);
reg_offset += 8;
imask &= ~(1UL << REG_RA);
......@@ -8116,7 +8116,10 @@ alpha_expand_epilogue (void)
{
mem = gen_rtx_MEM (DImode, plus_constant(sa_reg, reg_offset));
set_mem_alias_set (mem, alpha_sr_alias_set);
FRP (emit_move_insn (gen_rtx_REG (DImode, i), mem));
reg = gen_rtx_REG (DImode, i);
emit_move_insn (reg, mem);
cfa_restores = alloc_reg_note (REG_CFA_RESTORE, reg,
cfa_restores);
}
reg_offset += 8;
}
......@@ -8126,7 +8129,9 @@ alpha_expand_epilogue (void)
{
mem = gen_rtx_MEM (DFmode, plus_constant(sa_reg, reg_offset));
set_mem_alias_set (mem, alpha_sr_alias_set);
FRP (emit_move_insn (gen_rtx_REG (DFmode, i+32), mem));
reg = gen_rtx_REG (DFmode, i+32);
emit_move_insn (reg, mem);
cfa_restores = alloc_reg_note (REG_CFA_RESTORE, reg, cfa_restores);
reg_offset += 8;
}
}
......@@ -8142,7 +8147,9 @@ alpha_expand_epilogue (void)
mem = gen_rtx_MEM (DImode, plus_constant(hard_frame_pointer_rtx,
reg_offset));
set_mem_alias_set (mem, alpha_sr_alias_set);
FRP (emit_move_insn (gen_rtx_REG (DImode, i), mem));
reg = gen_rtx_REG (DImode, i);
emit_move_insn (reg, mem);
cfa_restores = alloc_reg_note (REG_CFA_RESTORE, reg, cfa_restores);
reg_offset -= 8;
}
......@@ -8152,15 +8159,18 @@ alpha_expand_epilogue (void)
mem = gen_rtx_MEM (DFmode, plus_constant(hard_frame_pointer_rtx,
reg_offset));
set_mem_alias_set (mem, alpha_sr_alias_set);
FRP (emit_move_insn (gen_rtx_REG (DFmode, i+32), mem));
reg = gen_rtx_REG (DFmode, i+32);
emit_move_insn (reg, mem);
cfa_restores = alloc_reg_note (REG_CFA_RESTORE, reg, cfa_restores);
reg_offset -= 8;
}
/* Restore the return address from the DSIB. */
mem = gen_rtx_MEM (DImode, plus_constant(hard_frame_pointer_rtx, -8));
mem = gen_rtx_MEM (DImode, plus_constant (hard_frame_pointer_rtx, -8));
set_mem_alias_set (mem, alpha_sr_alias_set);
FRP (emit_move_insn (gen_rtx_REG (DImode, REG_RA), mem));
reg = gen_rtx_REG (DImode, REG_RA);
emit_move_insn (reg, mem);
cfa_restores = alloc_reg_note (REG_CFA_RESTORE, reg, cfa_restores);
}
if (frame_size || eh_ofs)
......@@ -8183,7 +8193,7 @@ alpha_expand_epilogue (void)
else if (TARGET_ABI_UNICOSMK)
{
sp_adj1 = gen_rtx_REG (DImode, 23);
FRP (emit_move_insn (sp_adj1, hard_frame_pointer_rtx));
emit_move_insn (sp_adj1, hard_frame_pointer_rtx);
sp_adj2 = const0_rtx;
}
else if (frame_size < 0x40007fffL)
......@@ -8196,21 +8206,20 @@ alpha_expand_epilogue (void)
else
{
sp_adj1 = gen_rtx_REG (DImode, 23);
FRP (emit_move_insn (sp_adj1, sp_adj2));
emit_move_insn (sp_adj1, sp_adj2);
}
sp_adj2 = GEN_INT (low);
}
else
{
rtx tmp = gen_rtx_REG (DImode, 23);
FRP (sp_adj2 = alpha_emit_set_const (tmp, DImode, frame_size,
3, false));
sp_adj2 = alpha_emit_set_const (tmp, DImode, frame_size, 3, false);
if (!sp_adj2)
{
/* We can't drop new things to memory this late, afaik,
so build it up by pieces. */
FRP (sp_adj2 = alpha_emit_set_long_const (tmp, frame_size,
-(frame_size < 0)));
sp_adj2 = alpha_emit_set_long_const (tmp, frame_size,
-(frame_size < 0));
gcc_assert (sp_adj2);
}
}
......@@ -8224,46 +8233,58 @@ alpha_expand_epilogue (void)
mem = gen_rtx_MEM (DImode,
plus_constant (hard_frame_pointer_rtx, -16));
set_mem_alias_set (mem, alpha_sr_alias_set);
FRP (emit_move_insn (hard_frame_pointer_rtx, mem));
emit_move_insn (hard_frame_pointer_rtx, mem);
cfa_restores = alloc_reg_note (REG_CFA_RESTORE,
hard_frame_pointer_rtx, cfa_restores);
}
else if (fp_is_frame_pointer)
{
emit_insn (gen_blockage ());
mem = gen_rtx_MEM (DImode, plus_constant (sa_reg, fp_offset));
set_mem_alias_set (mem, alpha_sr_alias_set);
FRP (emit_move_insn (hard_frame_pointer_rtx, mem));
emit_move_insn (hard_frame_pointer_rtx, mem);
cfa_restores = alloc_reg_note (REG_CFA_RESTORE,
hard_frame_pointer_rtx, cfa_restores);
}
else if (TARGET_ABI_OPEN_VMS)
{
emit_insn (gen_blockage ());
FRP (emit_move_insn (hard_frame_pointer_rtx,
gen_rtx_REG (DImode, vms_save_fp_regno)));
emit_move_insn (hard_frame_pointer_rtx,
gen_rtx_REG (DImode, vms_save_fp_regno));
cfa_restores = alloc_reg_note (REG_CFA_RESTORE,
hard_frame_pointer_rtx, cfa_restores);
}
/* Restore the stack pointer. */
emit_insn (gen_blockage ());
if (sp_adj2 == const0_rtx)
FRP (emit_move_insn (stack_pointer_rtx, sp_adj1));
insn = emit_move_insn (stack_pointer_rtx, sp_adj1);
else
FRP (emit_move_insn (stack_pointer_rtx,
gen_rtx_PLUS (DImode, sp_adj1, sp_adj2)));
insn = emit_move_insn (stack_pointer_rtx,
gen_rtx_PLUS (DImode, sp_adj1, sp_adj2));
REG_NOTES (insn) = cfa_restores;
add_reg_note (insn, REG_CFA_DEF_CFA, stack_pointer_rtx);
RTX_FRAME_RELATED_P (insn) = 1;
}
else
{
gcc_assert (cfa_restores == NULL);
if (TARGET_ABI_OPEN_VMS && alpha_procedure_type == PT_REGISTER)
{
emit_insn (gen_blockage ());
FRP (emit_move_insn (hard_frame_pointer_rtx,
gen_rtx_REG (DImode, vms_save_fp_regno)));
insn = emit_move_insn (hard_frame_pointer_rtx,
gen_rtx_REG (DImode, vms_save_fp_regno));
add_reg_note (insn, REG_CFA_RESTORE, hard_frame_pointer_rtx);
RTX_FRAME_RELATED_P (insn) = 1;
}
else if (TARGET_ABI_UNICOSMK && alpha_procedure_type != PT_STACK)
{
/* Decrement the frame pointer if the function does not have a
frame. */
emit_insn (gen_blockage ());
FRP (emit_insn (gen_adddi3 (hard_frame_pointer_rtx,
hard_frame_pointer_rtx, constm1_rtx)));
emit_insn (gen_adddi3 (hard_frame_pointer_rtx,
hard_frame_pointer_rtx, constm1_rtx));
}
}
}
......@@ -10247,18 +10268,15 @@ unicosmk_gen_dsib (unsigned long *imaskP)
emit_insn (gen_blockage ());
/* Set the new frame pointer. */
FRP (emit_insn (gen_adddi3 (hard_frame_pointer_rtx,
stack_pointer_rtx, GEN_INT (64))));
}
else
{
/* Increment the frame pointer register to indicate that we do not
have a frame. */
FRP (emit_insn (gen_adddi3 (hard_frame_pointer_rtx,
hard_frame_pointer_rtx, const1_rtx)));
emit_insn (gen_adddi3 (hard_frame_pointer_rtx,
hard_frame_pointer_rtx, const1_rtx));
}
}
......
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